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Question: Compare directivity Dant of a 1 m diameter antenna aperture operating at 10 GHz with directivity Deye of the eye's pupil operating in the middle of the visible spectrum at λ = 0.5 μm. Treat the pupil as a circular aperture with a diameter of 4 mm.
An object is thrown vertically upward with an initial velocity of 14.7m/s, how long does it take for the object to be 9.8m from its initial position
A 20.0- projectile is fired at an angle of 60.0 above the horizontal with a speed of 80.0 . At the highest point of its trajectory, the projectile explodes into two fragments with equal mass, one of which falls vertically with zero initial speed.
An observer on Earth sees an alien vessel approach at a speed of 0.60c. Find the relative speed of one vessel as seen by the other
A 16-cm-diameter cylinder that is 39cm long contains 60g of oxygen gas at 20?C, What is the number density of the oxygen
A ladder 5.8 m long leans against a wall inside a spaceship. From the point of view of a person on the ship, the base of the ladder is 2.4 m from the wall, Find the angle the ladder makes with the floor
The cubit is an ancient unit. Its length equals six palms. (A palm varies from 2.50 to 3.50 inches depending on the individual.) We are told Noah's ark was 300 cubits long, 50 cubits wide and 30 cubits high.
Briefly and clearly explain the concept of Inertia held by; Galilio, Kepler, and Descartes. Make sure that your description clarify how these postions differ from one another
What is the maximum distance we can shoot a dart, from ground level, provided our toy dart gun gives a maximum initial velocity of 2.78 m/s and air resistance is negligible
Calculate the temperature of the object that emits blackbody radiation with the following peak wavelengths
An iron bar of mass, 0.81 kg, slides down a frictionless incline 0.39 m high. At the bottom of the incline it collides and sticks to a magnet of mass, 0.87 kg. What is the speed of the combined masses after collision.
The electric field near the middle of a long, thin, uniformly charged rod is 2.38×104 N/C at a distance of 6.63 cm from the rod. If the rod's length is 20.1 m, decide what is the charge on the rod?
An air parcel occupied by an ideal gas (T1 = 255 K, V1 = 1500m3, m1 = 1680 kg) collides and mixes with a second air parcel occupied by a second ideal gas (T2 = 280 K, V2 = 1200 m3, m2 = 1392 kg). Assuming the specific heat capacities of the gases in ..
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